diff --git a/lib/ansible/plugins/action/__init__.py b/lib/ansible/plugins/action/__init__.py
index cd650ce0a7e..87321901425 100644
--- a/lib/ansible/plugins/action/__init__.py
+++ b/lib/ansible/plugins/action/__init__.py
@@ -609,4 +609,7 @@ class ActionBase(with_metaclass(ABCMeta, object)):
                 diff['after_header'] = 'dynamically generated'
                 diff['after'] = source
 
+        if self._play_context.no_log and 'after' in diff:
+            diff["after"] = " [[ Diff output has been hidden because 'no_log: true' was specified for this result ]]"
+
         return diff